70c3ea29e2
This CL adds a quickfix CodeAction that detects "missing method"
compiler errors and suggests adding method stubs to the concrete
type that would implement the interface. There are many ways that
a user might indicate a concrete type is meant to be used as an interface.
This PR detects two types of those errors: variable declaration and function returns.
For variable declarations, things like the following should be detected:
1. var _ SomeInterface = SomeType{}
2. var _ = SomeInterface(SomeType{})
3. var _ SomeInterface = (*SomeType)(nil)
For function returns, the following example is the primary detection:
func newIface() SomeInterface {
return &SomeType{}
}
More detections can be added in the future of course.
Fixes golang/go#37537
Change-Id: Ibb7784622184c9885eff2ccc786767682876b4d3
Reviewed-on: https://go-review.googlesource.com/c/tools/+/274372
Reviewed-by: Heschi Kreinick <heschi@google.com>
Reviewed-by: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
gopls-CI: kokoro <noreply+kokoro@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
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|---|---|---|
| .. | ||
| api-diff | ||
| doc | ||
| integration/govim | ||
| internal | ||
| release | ||
| test | ||
| README.md | ||
| go.mod | ||
| go.sum | ||
| main.go | ||
README.md
gopls, the Go language server
gopls (pronounced "Go please") is the official Go language server developed
by the Go team. It provides IDE features to any LSP-compatible editor.
You should not need to interact with gopls directly--it will be automatically
integrated into your editor. The specific features and settings vary slightly
by editor, so we recommend that you proceed to the documentation for your
editor below.
Editors
To get started with gopls, install an LSP plugin in your editor of choice.
If you use gopls with an editor that is not on this list, please let us know
by filing an issue or modifying this documentation.
Installation
For the most part, you should not need to install or update gopls. Your
editor should handle that step for you.
If you do want to get the latest stable version of gopls, change to any
directory that is both outside of your GOPATH and outside of a module (a temp
directory is fine), and run:
go install golang.org/x/tools/gopls@latest
Learn more in the advanced installation instructions.
Setting up your workspace
gopls supports both Go module and GOPATH modes, but if you are working with
multiple modules or uncommon project layouts, you will need to specifically
configure your workspace. See the Workspace document for
information on supported workspace layouts.
Configuration
You can configure gopls to change your editor experience or view additional
debugging information. Configuration options will be made available by your
editor, so see your editor's instructions for specific details. A
full list of gopls settings can be found in the Settings documentation.
Environment variables
gopls inherits your editor's environment, so be aware of any environment
variables you configure. Some editors, such as VS Code, allow users to
selectively override the values of some environment variables.
Troubleshooting
If you are having issues with gopls, please follow the steps described in the
troubleshooting guide.
Supported Go versions and build systems
gopls follows the
Go Release Policy,
meaning that it officially supports the last 2 major Go releases. Per
issue #39146, we attempt to maintain best-effort
support for the last 4 major Go releases, but this support extends only to not
breaking the build and avoiding easily fixable regressions.
The following table shows the final gopls version that supports being built at a given Go Version. Any more recent Go versions missing from this table can still be built with the latest version of gopls.
| Go Version | Final gopls Version With Support |
|---|---|
| Go 1.12 | gopls@v0.7.5 |
Our extended support is enforced via continuous integration with older Go versions. This legacy Go CI may not block releases: test failures may be skipped rather than fixed. Furthermore, if a regression in an older Go version causes irreconcilable CI failures, we may drop support for that Go version in CI if it is 3 or 4 Go versions old.
gopls currently only supports the go command, so if you are using a
different build system, gopls will not work well. Bazel is not officially
supported, but Bazel support is in development (see
bazelbuild/rules_go#512).
You can follow these instructions
to configure your gopls to work with Bazel.